using very careful ( otherwise cause damage to your eyes and your camera equipments) techniques and planning: From: Colleen Pinski, Sun's Embrace 500mm supertele lens on canon 7D ( APS-C): 800mm eqv focal length ND 4 filter (10 stops) ? 500 meters away from subject: Joshua Cripps Nikon Z 7 (full frame sensor ) in DX crop mode, with the AF-S NIKKOR 200-500mm f/5.6E ED VR lens attached using the Mount Adapter FTZ. Focal length at 500mm (750mm equivalent in DX mode), f/8, 1/100 second, ISO 200, manual exposure, Matrix metering. A 10-stop ND (neutral density) filter was on the lens. 400 to 500 meters away from subject nikonusa Albert Dros Sony A7 (full frame) ,400mm lens. 300 meters from subject. With ND filter Taron Lexton, Ted Hesser fstopper Nikon Z7 mirrorless camera and a Nikon AF-S Nikkor 500mm f/5.6 PF ED VR lens with a Nikon AF-S Teleconverter TC-20E-III ,1000mm eqv focal length f/...